C#•2y ago

possible combinations of upper and lower case string

How to get all possible combinations of upper and lower case string stored as a list of strings?

46 Replies

Unknown User•2y ago

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armin•2y ago

I need to iterate through them

Unknown User•2y ago

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Tvde1•2y ago

How big is your input data?

Unknown User•2y ago

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armin•2y ago

but that is exactly my question

Unknown User•2y ago

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armin•2y ago

i am able to do something like this: cat => Cat, cAt, caT

Unknown User•2y ago

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armin•2y ago

but i need all combinations what is yield returining and why is your name exaxtly that coincidence?

Unknown User•2y ago

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armin•2y ago

i only need it for small words, im not going to have to get all combinations of a 1000 character word

Unknown User•2y ago

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armin•2y ago

No I dont.

Unknown User•2y ago

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armin•2y ago

I mean I can tell you, but I dont know how that will help I want to create hashes for all combinations

Unknown User•2y ago

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armin•2y ago

Is the need evaded?

Unknown User•2y ago

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armin•2y ago

I really dont want to use yield

Unknown User•2y ago

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armin•2y ago

I have never heard or seen it And a list seems perfomant enough

Unknown User•2y ago

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Tvde1•2y ago

using System;
using System.Collections.Generic;
    
IEnumerable<string> GivePermutations(string input)
{
    if (input.Length == 0)
    {
        yield return string.Empty;
        yield break;
    }

    foreach (var permutation in GivePermutations(input[1..])
    {
        yield return char.ToUpper(input[0]) + permutation;
        yield return char.ToLower(input[0]) + permutation;
    }
}

foreach (var permutation in GivePermutations("cat"))
{
    Console.WriteLine(permutation);
}

using System;
using System.Collections.Generic;
    
IEnumerable<string> GivePermutations(string input)
{
    if (input.Length == 0)
    {
        yield return string.Empty;
        yield break;
    }

    foreach (var permutation in GivePermutations(input[1..])
    {
        yield return char.ToUpper(input[0]) + permutation;
        yield return char.ToLower(input[0]) + permutation;
    }
}

foreach (var permutation in GivePermutations("cat"))
{
    Console.WriteLine(permutation);
}

this was fun 🙂

armin•2y ago

yes

Tvde1•2y ago

https://sharplab.io/#v2:EYLgxg9gTgpgtADwGwBYA0AXEUCuA7AHwAEAmARgFgAoIgBgAIiyUBua+j+6pgZgB4mtAHz0A4gEsAbjAAKMKAFscGAIYZxEPAGcAFIPri8AB2VoDeDOYAmMBPQC89WgEpqAb3adxAM3o7DJhgAdAAyMHgA5hgAFg6OLp4cHlScqYxkZIwA7Om0QQCiCkYYAJ5sKWkcTJnAsCoA1uWpAL7UifTe0DAqYLE6kipQ9EbySqrqmuZiUrKjymoa2v7GygDaZEFBALpmhjZ2ANT0ZM6uFUntqdXZ9L2DQQAqEACqRiNQy4GrtFvO9EfvMYLTRNSrpTJEHJ3KCPCAhCAAd3knzWPz+ALm40WoI4rSoeOonTqvT8AyGgPmEzwUwk0jkikpi10ACIwGpmad3O0mABOHQUrGaZzlZpAA=

SharpLab

C#/VB/F# compiler playground.

Tvde1•2y ago

you can see the longer the string the bigger it gets

armin•2y ago

thanks, I don't want to force someone to code it again, but I wonder how much better it really is than with lists

Unknown User•2y ago

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Tvde1•2y ago

also you can remove the index, it isn't used anywhere anymore

armin•2y ago

Thank you

Tvde1•2y ago

though you probably are doing something wrong if you need all permutations

Unknown User•2y ago

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armin•2y ago

Tvde1•2y ago

good luck bruteforcing someone's password haha

armin•2y ago

educational purposes

Unknown User•2y ago

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armin•2y ago

Whats that supposed to mean

Unknown User•2y ago

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armin•2y ago

okay thats true

Unknown User•2y ago

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armin•2y ago

jesus that doesn't look like C# for me anymore

Unknown User•2y ago

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armin•2y ago

idk if im inexpierenced, i have made some stuff work im not a professional ofc but syntax is just something i try to avoid for more readable code (also for myself)

Unknown User•2y ago

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armin•2y ago

Oh I have no mute here, nice Well it wasn't particularly necessary to do it this way Hmm

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possible combinations of upper and lower case string